Oil-burning means for boilers



n j. OIL BURNING MEANS FOR BOILERS Filed Je e, 1921 @OOO OOOGOO @009000- OOOOOOOOO OOGGGGOGO OOOGOOGOO OOGOOOOGO OQOOGOGOG @0000630y OOGOOO @OOO- A TTOHNEYS Patented Sept. 29, 1925.

UNITED STATES DANIEL OBRIEN, on PALESTINE, TEXAS,

ASSIGNOR O'F TWO-THIRDS TO AMERICAN ARCH COMPANY, A CORPORATION OF DELAWARE.

OIL-BURNING MEANS FOR BOILERS.

Application filed June 6,

T 0 all whom t may concern:

Be it known that I, DANmL OBRIEN, a citizen of the United States, and a resident of Palestine, in the county of Anderson and State of Texas (temporarily located in Habana, Cuba), have invented certain new and useful Improvements in Oil-Burning Means for Boilers, of which the following is a specification.

My invention relates to oil burning means more particularly adapted to be employed in connection with steam boilers, either locomotive or stationary.

The general object of the invention is to provide for a more complete combustion of the oil by providing` a pan beneath the oil burner and arranged to heat the air supplied to the interior of the furnace adjacent to the burner and adjacent to the splash wall opposite ther burner.

The above and other objects as will appear are attained by the pan and associated features as hereinafter particularly described and claimed.

Reference is to be had tothe accompanying drawings forming part of this specification, it being understood that thedrawings are merely illustrative of one example of the invention.

Figure 1 is a longitudinal vertical section of my improved oil burning means as embodied in a boiler of the locomotive type;

Figure 2 is a transverse vertical section on the line 2-2, Figure 1;

Figure 3 is a front view, the boiler being partly in section.

The boiler 10 may be generally of any approved construction. At the bottom of the fire boX is a pan inclined so as to dip from the front toward the back of the fire box, said pan being curved in cross section to be highest at the sides. The :pan is shown as including a metal bottom frame 11 on which is laid a brick'work lining 12 above which is abroad air passage 13 and a narrower air passage 13a, through which passage 13A air passes from the front end rearwardly to discharge at its rear end 15 adjacent to the back of the vfire box. The air passage 13a passes from the rear of the ire box forwardly to the front end of the pan as further referred to hereinafter. The

1921. serial N-o. 475,374.

pan is sustained from the bottom 16 of the boiler by any suitable means, there being shown in the present 'neXample a metallic plate element 17 rising from the bottom 16 and having the flange 18 beneath the frame l1. At the top of the air passages 13, 13 is a suitable framework 19 and at the front of the pan is any suitable supporting framework 20, both of metal. The passage 13a is defined at the sides by angle bars 21 and said passage and the passage 13 are covered with transversely curved brickwork 22.

A burner nozzle 23 is positioned adjacent to the front end of the pan above the brickwork 22 and disposed rearwardly so that it will direct oil under pressure against a splash-wall 24. Said burner is connected by a pipe 23a with any convenient source of fuel supply under pressure. The splashwall 24 is here shown as including a metal casing filled with brick 25 and has rigid therewith a back 26, the lower end of which has a foot 27 supporting said wall. The back 26 is riveted or otherwise secured to a channel bar 28, there being an opposed channel bar 29 secured to the rear head 30 of the boiler, to form a hollow'beam.

A well 31 isfprovided beneath the splashwall 24 and extends forwardly beyond same to the rear end of the pan, the air passing rearwardly through the passage 13 and outlet 15 entering said well. Said well at the top in front of the splash-wall 24 may have a screen 32 to break up the oil falling from the splash wall to said well.

At the front end of the pan and in front of the nozzle 23 is a valve or door 33 through which air may be admitted directly to the region of said nozzle in addition to the air issuing from the air passage 13a. At the well 3l the rear wall of the boiler has a valve or door 34 for the admission of air, said door being here shown as hinged and having a lifting arm 35. In order that the attendant may control the door 34 and also the door 33 from the back of the boiler, the door 33 has an arm 36 thereon secured to which is a link 37 which in turn is secured to a bell crank lever 38 from which a connecting rod 39 extends rearwardly and has connection with an oscillating operating standard 40 pivoted between its ends on a fixed standard 11 located adjacent to the lifting arm 35.

The front structure 2O provides a chamber 42 into which the air passing upwardly in the' passage 13a delivers. The valve 33 can admit air direct to said chamber.

lith the above described construction air will be taken into the passage 13 at the front end of the pan and in its passage through the pan to the rear end said air will be heat: d for delivery to the well 31 and the region of the splash wall 24 where the combustion largelyv takes place. At the same time some of the air will pass from the discharge end 15 of passage 13 to the return passage 13a and be delivered after aV further heating thereof in the pan to the region of the nozzle 23. At the same time fresh air can be admitted through the valvrs 33 and 311, when desired. Thus, an ample quantity of pre-heated air' is supplied for promoting combustion. By producing the air passages in aV transversely curved pan, the return passage 1321 which is at one side, will have a mean height substantially above the adjacent portion of the larger passage 13 and the one will not materially influence the othr. The relatively large size of the passage 13 provides the larger quantity of air in the region of the splash-wall 241 and well 31 where the greatest combustion takes place, whereas the amount of highly heated air delivered in the immediate region of the nozzle 23 from the passage 13a supplies sufhcient air to the nozzle and in the proper condition as to temperature.

I would state in conclusion that while the illustrated example constitutes a practical embodiment of my invention, I do not limit myself strictly to the mechanical details herein illustrated since manifestly the same can be considerably varied without de; parture frome the spirit of the invention as defined: in the appended claims;

I claim:

1. In an oil burner, an elongated transversely curved pan adapted to be placed in the fire box of a boiler below the burner thereof to be subject to the heat of the fire box, saidY pan having an air passage extending rearwardly therethrough to supply heated air to the combustionr chamber, at the rear end thereof and having a return passage at a side of the pan, the medial plane of the return passage'thus being above the medial plane of the first-mentioned passage.

`2. In oil-burning means for boilers, a pan adapt d to be positioned in a boiler at the bottom of the lire box, said pan having an air passage leading therethrough toward the back end to deliver air to the rear end of the firebox and having a return passage discharging at the front end, the medial transverse line of the last-mentioned passage being in a plane above the plane of the medial line of the first-mentioned passage.

3; In oil-burning means for boilers, a pau adapted to be positioned in a boiler at the bottom of the lire box, said pan having a passage leading' therethrough toward the back end to deliver air to the rear end of the fire box and having a return passage discharging at the front end.

4L. A means for burning oil in boilers, comprising av pan, a splash-wall rearward of the rear end of the pan, a well beneath said splash-wall and extending to said pan', said' pan having an air passage to conduct air rearwardly through the pan to said well.

5. A means for burning oil in boilers, comprising a pan, a splash-wall rearward of the rear end of the pan, a well beneath said splash-wall and extending to said pan, said pan having an air passage to conduct air rearwardly through the pan to said wall, the pan furthermore having a return passage leading from the rear end of the pan forwardly to the front end thereof, there being a chamber at said front end.

G. A means for burning oil in boilers, comprising a pan, a splash-wall rearward of the rear end of the pan, a well beneath said splash-wall and extending to said pan, said pan having an air passage toconduct air rearwardly through the' pan to said well, the pan vfurthermore having.y al return passage leading from the rear end of the pan forwardly to the fro'nt end thereof, there being a chamber at saidfront end, and a burner nozzle mounted adjacent to said chamber and above said return passage.

7. In oil-burningmeans for boilers, a pan positioned in the fire box at the bottom', said pan having an air passage'leading from the front end rearwardly, there being a well below the `tire box rearward of the pan, a splash-wall above said well, and al nozzle positioned above the front end of the pan and disposed in the direction of said splashwall to direct oil against the latter.

8. In oil-burning means for boilers, a pan positioned in the tire box of the boiler at the bottom, a well at the rear end of the pan directly communicating with the lire box; av splash-wall above' said well, and a nozzle positioned above the pan at the front end and disposed in the direction of said splash-wall; together with means to admit air to' said well below the splash-wall.

9. In oil-burning means for boilers, a pan positioned in the'V` lire' box of the boiler at the bottom and terminating short of the rear end thereof, a well in the rear of the pan, said pan having an air passage leading rearwardly therethrough to said well, and a return passage from said well through the pan to the front end thereof, a burner nozzle above the pan at the front end, a closure in frontof the lest-mentioned air passage and nozzle thereby forming a chamber to which said last-mentioned passage delivers, and means to admit fresh air to said well or to said chamber.

10. The combination with the back wall of a boiler, of a hollow beam in said wall, a

splash-Wall in front of said back wall, an element on the backof said splash-wall and 10 having a foot supporting the latter, and a connection between said hollow beam and said element.

In testimony whereof, I have hereunto signed my name.

D. OBRIEN. 

